Read just the IP address of a device

/sbin/ifconfig | awk -F'[ :]+' '/inet addr/{print $4}'
That one works on Linux. On BSD and Solaris, the ifconfig output is much easier to parse: /sbin/ifconfig -a | awk '/inet/{print $2}'

By: inof
2009-07-21 14:18:17

6 Alternatives + Submit Alt

What Others Think

running bash the /sbin/ifconfig -a | awk '/inet/{print $2}' worked fine with just a little extra output (1 extra line per nic),
random_bob · 605 weeks and 4 days ago
@random_bob: Yeah, but when you need the IPs in a script, you must get rid of the extra output, so the simple solution isn't sufficient. Parsing usually needs to be exact in scripts. Otherwise "ifconfig | grep inet" would work fine, too, with 'some' extra output ... :-)
inof · 594 weeks and 4 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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